EP3376219A1 - Nondestructive inspection method and coupling medium pressing jig - Google Patents
Nondestructive inspection method and coupling medium pressing jig Download PDFInfo
- Publication number
- EP3376219A1 EP3376219A1 EP16897012.7A EP16897012A EP3376219A1 EP 3376219 A1 EP3376219 A1 EP 3376219A1 EP 16897012 A EP16897012 A EP 16897012A EP 3376219 A1 EP3376219 A1 EP 3376219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact medium
- inspection object
- inspection
- pressing jig
- nondestructive inspection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2638—Complex surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2693—Rotor or turbine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2694—Wings or other aircraft parts
Definitions
- the present disclosure relates to a nondestructive inspection method and a contact medium pressing jig.
- Patent Document 1 An inspection method for human bodies and the like in which anatomical measurements and functions of body tissue, organs and the like are inspected using reflection characteristics and acoustic characteristics of the body tissue obtained using ultrasonic pulse reflection waves is disclosed in Patent Document 1 as a nondestructive inspection method.
- a contact medium is attached to the surface of the inspected part of the patient, and the ultrasonic oscillator is then placed in contact with the surface of the inspected part via the contact medium.
- guar gum gel is used as the contact medium.
- Patent Document 1 Japanese Unexamined Patent Application, First Publication No. S56-005647
- CFRP carbon fiber reinforced plastics
- a honeycomb structural body that secures mechanical strength and also serves as a buffer material in the event of a collision with an object is provided on an inner side of the fan case.
- an inspection object is a simple structural body, such as a surface of a human body, which is more or less flat. Accordingly, when the inspection object is a structural body having a complex shape, such as a fan case having a honeycomb structural body provided on the inner side thereof, it is difficult, if a contact medium is simply attached onto the surface of the inspection object, to ensure that the space is properly filled with this contact medium, and there is a possibility that this will affect the quality of a defect inspection performed using ultrasonic waves. Because of this, conventionally, it has been necessary to perform a large-scale inspection by removing the jet engine from the plane at an airport or the like, and then dismantling the fan case.
- the present disclosure was conceived in view of the above-described problems points, and it is an object thereof to provide a nondestructive inspection method that can inspect an inspection object on site (i.e., on-wing) easily even when the inspection object has a complex shape, and a coupling medium pressing jig that is suitable for this method.
- a nondestructive inspection method is a nondestructive inspection method in which a contact medium is attached to an inspection object, a nondestructive inspection of the inspection object is performed using an ultrasonic probe via the contact medium, a polymer gel in which high polymers are cross-linked is used as the contact medium, and after the contact medium has been attached to the inspection object, and before the nondestructive inspection is performed, the contact medium is pressed against the inspection object.
- a contact medium pressing jig is a contact medium pressing jig that presses a contact medium against an inspection object, and is provided with a pressing surface that is parallel to a surface of the inspection object.
- a polymer gel is used as the contact medium, and the contact medium is pressed against the inspection object before the nondestructive inspection using the ultrasonic probe is performed.
- the contact medium that is formed by the polymer gel can be deformed so as to match the complex shape of the inspection object, and can be spread to all corners of a space, so that the contact medium is able to properly fill the space entirely.
- the polymer gel is deformed flexibly in accordance with the shape of the inspection object, work efficiency when filling the space with the contact medium is improved.
- the thickness of the contact medium is uniformized as a result of the contact medium being pressed so that the quality of a defect inspection performed using an ultrasonic probe can be improved.
- the polymer gel has a predetermined viscosity and is able to attach to an object, compared with other contact mediums such as water and oils, drops of polymer gel do not fall down and polymer gel does not contaminate surrounding areas. Moreover, because the polymer gel is a semisolid, it can be easily removed, and can also be reused.
- the inspection object has a complex shape, it is possible to perform an on-site nondestructive inspection easily.
- FIG. 1 is a diagram representing a nondestructive inspection method according to an embodiment of the present disclosure.
- a contact medium 10 is attached to an inspection object 1, and a nondestructive inspection of the inspection object 1 is made using an ultrasonic probe 20 via the contact medium 10.
- the inspection object 1 of the present embodiment is a fan case of a jet engine, and is formed by laminating a plurality of layers of a composite material 2.
- the composite material 2 is formed from fiber reinforced plastic (FRP). More specifically, the composite material 2 is formed from carbon fiber reinforced plastic (CFRP) which is manufactured by impregnating a resin material with carbon fibers.
- FRP fiber reinforced plastic
- CFRP carbon fiber reinforced plastic
- the composite material 2 is lightweight compared to a metal material, and has a strength that is not inferior to that of metal. However, because the layers of the composite material 2 are bonded together using resin, if an impact is applied thereto, in some cases interlayer separation S may occur between the layers of the composite material 2.
- a honeycomb structural body 3 is provided on a surface 1a of the inspection object 1.
- the honeycomb structural body 3 is provided on an inner side of the fan case.
- the honeycomb structural body 3 stands upright to a predetermined height from the surface 1a of the inspection object 1.
- the honeycomb structural body 3 also serves as a buffer in the event of a collision with an object. For example, if a bird strike occurs, a portion of the honeycomb structural body 3 that has been deformed as a result of this bird strike is removed, and a nondestructive inspection as to whether or not any interlayer separation S has occurred between the layers of composite material 2 is performed. Note that FIG.
- FIG. 1 shows a state in which a portion of the honeycomb structural body 3 has been removed, in other words, a state in which the honeycomb structural body 3 is lower than its original height (i.e., in a range from approximately several mm to several cm from the surface 1a).
- honeycomb structural body 3 One reason for leaving a portion of the honeycomb structural body 3 is that, if the honeycomb structural body 3 is removed completely, there is a deterioration in the mechanical strength of the composite material 2. A further reason is that, by leaving a small portion of the honeycomb structural body 3, when the honeycomb structural body 3 is cut out, any damage to the composite material 2 is prevented. Yet another reason is that, if it is confirmed through the nondestructive inspection that there is no separation S between the layers of the composite material 2, then the portion of the honeycomb structural body 3 that has been cut out is subsequently refilled using a potting material (i.e., a resin material), and it is easy in this case for the potting material to be firmly attached to the honeycomb structural body 3 due to the complex shape of the honeycomb structural body 3.
- a potting material i.e., a resin material
- the contact medium 10 fills a space between the inspection object 1 and the ultrasonic probe 20.
- the contact medium 10 is attached to the surface 1a of the inspection object 1 to a height (i.e., a thickness) that is greater than the height of the honeycomb structural body 3 by a predetermined distance D. If the ultrasonic probe 20 (a solid object) is placed in contact with the honeycomb structural body 3 (a solid object), in other words, if a solid object and a solid object are in mutual contact, the attenuation rate of the ultrasonic probe shows a marked increase. Accordingly, by making the height of the contact medium 10 greater than the height of the honeycomb structural body 3, the ultrasonic probe 20 can be prevented from coming into contact with the honeycomb structural body 3.
- the shape of the contact medium 10 located at a higher position than the honeycomb structural body 3 is maintained by a frame body 30 that surrounds the periphery of the contact medium 10.
- the frame body 30 is formed in a toroidal shape, and surrounds an inspection range X of the inspection object 1.
- the inspection range X may be circular or rectangular or, alternatively, may have another shape (for example, elliptical or polygonal or the like). Note that if a contact medium 10 having high viscosity is used, then the frame body 30 may be omitted.
- the contact medium 10 is a polymer gel in which high polymers are cross-linked.
- a highly polymerized compound such as PVA (polyvinyl alcohol) or the like
- borax borax or the like
- a natural polysaccharide such as, for example, gum tragacanth, locust bean gum, sodium alginate, carrageenan, and guar gum and the like may be used as the high polymer compound.
- Natural polysaccharides have superior acid resistance, salt tolerance, and resistance to chemicals. They are also non-toxic, are low in cost, and are easily obtainable.
- the ultrasonic probe 20 performs a nondestructive inspection of the inspection object 1 via the contact medium 10. Specifically, the ultrasonic probe 20 causes ultrasonic waves to be transmitted via the contact medium 10 to the inspection object 1, and then, based on echo signals reflected from the inspection object 1, detects whether or not any defect such as interlayer separation S is present.
- the contact medium 10 has an effect of mitigating any discontinuity in the acoustic impedance, and ensuring that acoustic waves are efficiently transmitted to the inspection object 1. It has become evident through experiments that this effect is also imparted to the contact medium 10 which is made from polymer gel.
- a plurality of ultrasonic probes 20 having mutually different frequencies may be used in combination.
- an interlayer separation S in a shallow location from the surface 1a of the inspection object 1 may be inspected using a high-wavelength (for example, in a range from 5 to 15 MHz) ultrasonic probe 20, and an interlayer separation S in a deep location from the surface 1a of the inspection object 1 may be inspected using a low-wavelength (for example, in a range from 1 to 5 MHz) ultrasonic probe 20.
- a high-wavelength for example, in a range from 5 to 15 MHz
- a low-wavelength for example, in a range from 1 to 5 MHz
- the resolution by raising the frequency and shortening the wavelength.
- the path of the ultrasonic waves reflected by the interlayer separation S is longer than the path of the ultrasonic waves reflected by the surface 1a, so that attenuation of the ultrasonic waves may occur.
- it is preferable to raise the penetrative force of the ultrasonic waves by lowering the frequency and lengthening the wavelength.
- FIG. 2A through FIG. 2C are views representing steps in which the contact medium 10 is attached to the inspection object 1 in the nondestructive inspection method according to the embodiment of the present disclosure.
- the frame body 30 is positioned surrounding the inspection range X of the inspection object 1.
- an appropriate quantity of the contact medium 10 is placed on the inner side of the frame body 30.
- a contact medium pressing jig 40 is inserted on the inner side of the frame body 30, and is made to press the contact medium 10 placed inside the frame body 30 against the inspection object 1.
- the contact medium pressing jig 40 is provided with a rod-shaped handle portion 41, and a pressing portion 42 that is provided at a distal end of the handle portion 41.
- the size of the pressing portion 42 is such that the pressing portion 42 can be inserted inside the frame body 30.
- the size of the pressing portion 42 of the present embodiment is substantially the same as that of a space on the inner side of the frame body 30.
- the pressing portion 42 is guided by an inner wall surface of the frame body 30 such that any tilting of the pressing portion 42 is prevented, and, in this state, presses the contact medium 10 against the inspection object 1.
- the pressing portion 42 is provided with a pressing surface 42a that is parallel with the surface 1a of the inspection object 1.
- the pressing surface 42a is also a flat surface.
- the inspection object 1 of the present embodiment is a cylinder-shaped fan case, however, because the fan case has a large diameter, the surface 1a within the inspection range X can be regarded as a substantially flat surface.
- the surface 1a is slightly curved, then it is preferable that the pressing surface 42a also be slightly curved so as to match the shape of the surface 1a.
- the contact medium 10 is spread to all corners of the honeycomb structural body 3, and, additionally, the height of the contact medium 10 becomes uniform.
- the contact medium pressing jig 40 is lifted up and, as is shown in FIG. 1 , the ultrasonic probe 20 is placed in contact with the contact medium 10, and then the inspection of the inspection object 1 is performed.
- a fluororesin coating or the like may be applied to the pressing surface 42a in order to enable the contact medium pressing jig 40 to be separated easily from the contact medium 10 when the contact medium pressing jig 40 is lifted up.
- FIG. 3A and FIG. 3B are views representing steps in which the contact medium 10 is separated from the inspection object 1 in the nondestructive inspection method according to the embodiment of the present disclosure.
- a contact medium separating jig 50 is inserted along the inner wall surface of the frame body 30 with which the contact medium 10 is in contact.
- the contact medium separating jig 50 may be formed, for example, in a narrow rod shape having a bent distal end.
- FIG. 3B by lifting up the contact medium separating jig 50 that has been inserted along the inner circumferential wall of the frame body 30, the contact medium 10 can be easily separated from the honeycomb structural body 3.
- a polymer gel is used for the contact medium 10, and the contact medium 10 is pressed against the inspection object 1 prior to the nondestructive inspection using the ultrasonic probe 20 being performed.
- the contact medium 10 that is formed from a polymer gel can be deformed so as to match the complex shape of the inspection object 1, and can be spread to all corners of a space so that the ability of the contact medium 10 to fill a space is ensured.
- a polymer gel can be flexibly deformed in accordance with the shape of the inspection object 1, work efficiency when filling a space with the contact medium 10 is improved.
- the thickness of the contact medium 10 is uniformized as a result of the contact medium 10 being pressed, and therefore the quality of a defect inspection performed using the ultrasonic probe 20 can be improved.
- a polymer gel has a predetermined viscosity and is able to attach to an object, compared with other contact mediums such as water and oils, drops of polymer gel do not fall down and therefore polymer gel do not contaminate surrounding areas.
- the polymer gel is a semisolid, it can be easily removed, and can also be reused.
- the contact medium 10 is attached to the inspection object 1, and a nondestructive inspection of the inspection object 1 is made using the ultrasonic probe 20 via the contact medium 10.
- a polymer gel in which high polymers are cross-linked is used as the contact medium 10, and after the contact medium 10 has been attached to the inspection object 1, and before the nondestructive inspection is performed, the contact medium 10 is pressed against the inspection object 1.
- contact medium pressing jig may also have one of the structures described below.
- FIG. 4 is a structural diagram of a contact medium pressing jig 40A according to another embodiment of the present disclosure.
- the contact medium pressing jig 40A shown in FIG. 4 is provided with spacers 43 that maintain the distance between the pressing surface 42a and the surface 1a of the inspection object 1 at a fixed distance.
- the spacers 43 are supported on the pressing portion 42.
- the spacers 43 are formed in a rod shape, and are provided protruding from the pressing surface 42a.
- the spacers 43 are formed longer than the honeycomb structural body 3. In consideration of providing stability when the contact medium pressing jig 40A performs a pressing action, it is preferable that three or more spacers 43 be provided.
- the contact medium pressing jig 40A because the contact by the pressing portion 42 with the honeycomb structural body 3 is restricted as a result of the distal end of the spacers 43 being in contact with the surface 1a, the thickness D of the contact medium 10 can be reliably secured. As a consequence, work efficiency when pressing the contact medium 10 against the inspection object 1 is improved.
- FIG. 5 is a structural diagram of a contact medium pressing jig 40B according to another embodiment of the present disclosure.
- the contact medium pressing jig 40B shown in FIG. 5 is provided with a frame portion 44 that surrounds the inspection range X of the inspection object 1.
- the ultrasonic probe 20 is disposed, via a second contact medium 60, on a rear surface 42b which is on an opposite side to the pressing surface 42a.
- the frame portion 44 is formed integrally with the pressing portion 42.
- the frame portion 44 is formed in a toroidal shape, and protrudes from an outer edge portion of the pressing surface 42a. By being in contact with the honeycomb structural body 3, the frame portion 44 also performs the function of the spacer 43.
- the ultrasonic probe 20 is disposed in an interior portion of the hollow contact medium pressing jig 40B.
- the second contact medium 60 is coated onto the rear surface 42b which is on the opposite side to the pressing surface 42a.
- the second contact medium 60 may also be formed from the above-described polymer gel, or, alternatively, a normal, widely-used contact medium such as glycerin or the like.
- a nondestructive inspection using the ultrasonic probe 20 which is disposed in the interior portion of the contact medium pressing jig 40B can be performed without lifting up the contact medium pressing jig 40B, so that the work efficiency of the nondestructive inspection is improved.
- FIG. 6A and FIG. 6B are structural diagrams of a contact medium pressing jig 40C according to another embodiment of the present disclosure.
- the contact medium pressing jig 40C shown in FIG. 6A and FIG. 6B is provided with a communicating portion 44a that enables an inner surface 44A of the frame portion 44 to communicate with an outer surface 44B thereof.
- the frame portion 44 is formed in a toroidal shape on an outer side of the pressing surface 42a, and the communicating portion 44a is a groove that is formed in a straight line extending from the inner surface 44A to the outer surface 44B of the frame portion 44.
- the communicating portion 44a may also be formed as a hole. As is shown in FIG.
- FIG. 7A and FIG. 7B are structural diagrams of a contact medium pressing jig 40D according to another embodiment of the present disclosure.
- the contact medium pressing jig 40D shown in FIG. 7A and FIG. 7B is provided with a claw portion 45 that grasps the contact medium 10.
- the claw portion 45 is formed so as to protrude inwards from a distal end of the frame portion 44.
- the claw portion 45 may be formed a toroidal shape, or, alternatively, a plurality of claw portions 45 may be formed as projections at intervals in a circumferential direction.
- FIG. 7B the contact medium 10 can be separated from the inspection object 1 integrally with the contact medium pressing jig 40D. Because of this, the work efficiency when separating the contact medium 10 from the inspection object 1 is improved.
- FIG. 8 is a plan view representing a contact medium 10 that is attached to an inspection object 1 in the nondestructive inspection method according to another embodiment of the present disclosure.
- the contact medium 10 may contain a phosphorescent material 11.
- Zinc sulfide (ZnS-based), strontium aluminate (SrA1204-based) or the like may be used as the phosphorescent material 11. Because it is difficult for light to reach the interior of the fan case, work performed there takes place in a dark field. As the phosphorescent material 11 is contained in the contact medium 10, an operator is able to more easily view the contact medium 10. As a consequence, it becomes easy to confirm that the task of filling a space with the contact medium 10 has been performed properly, or to confirm whether any contact medium 10 is remaining during a separation operation.
- FIG. 9 is a structural view of a contact medium 10A that is used in a nondestructive inspection method according to another embodiment of the present disclosure.
- the contact medium 10A is formed in a shape that conforms to the shape of the honeycomb structural body 3.
- the contact medium 10A is provided with a plurality of protruding portions 10a that are inserted into the spaces in the honeycomb structural body 3.
- the protruding portions 10a are formed longer than the depth of the spaces in the honeycomb structural body 3, so that when the contact medium 10A is engaged with the inspection object 1 and is pressed against the inspection object 1, the protruding portions 10a are contracted in the long axial direction thereof and are placed in firm contact with the surface 1a.
- the protruding portions 10a become fatter, the protruding portions 10a fill the spaces in the honeycomb structural body 3.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
- The present disclosure relates to a nondestructive inspection method and a contact medium pressing jig.
- Priority is claimed on Japanese Patent Application No.
2016-073187, filed March 31, 2016 - An inspection method for human bodies and the like in which anatomical measurements and functions of body tissue, organs and the like are inspected using reflection characteristics and acoustic characteristics of the body tissue obtained using ultrasonic pulse reflection waves is disclosed in
Patent Document 1 as a nondestructive inspection method. In this inspection method, because it is necessary to hold an ultrasonic oscillator firmly in contact with the surface of the inspected part of the patient, a contact medium is attached to the surface of the inspected part of the patient, and the ultrasonic oscillator is then placed in contact with the surface of the inspected part via the contact medium. InPatent Document 1, guar gum gel is used as the contact medium. - [Patent Document 1] Japanese Unexamined Patent Application, First Publication No.
S56-005647 - In recent years, in order to achieve a reduction in the weight of jet engines, composite materials such as carbon fiber reinforced plastics (CFRP) are used, and fan cases are formed by laminating layers of such composite materials.
- A honeycomb structural body that secures mechanical strength and also serves as a buffer material in the event of a collision with an object is provided on an inner side of the fan case. In this structure, when bird strike or the like occurs, it is necessary to remove a portion of the honeycomb structural body that has been deformed by the bird strike, and to perform a nondestructive inspection as to whether or not any separation or the like has occurred between the layers of composite material.
- In the related art described in
Patent Document 1, an inspection object is a simple structural body, such as a surface of a human body, which is more or less flat. Accordingly, when the inspection object is a structural body having a complex shape, such as a fan case having a honeycomb structural body provided on the inner side thereof, it is difficult, if a contact medium is simply attached onto the surface of the inspection object, to ensure that the space is properly filled with this contact medium, and there is a possibility that this will affect the quality of a defect inspection performed using ultrasonic waves. Because of this, conventionally, it has been necessary to perform a large-scale inspection by removing the jet engine from the plane at an airport or the like, and then dismantling the fan case. - The present disclosure was conceived in view of the above-described problems points, and it is an object thereof to provide a nondestructive inspection method that can inspect an inspection object on site (i.e., on-wing) easily even when the inspection object has a complex shape, and a coupling medium pressing jig that is suitable for this method.
- A nondestructive inspection method according to an aspect of the present disclosure is a nondestructive inspection method in which a contact medium is attached to an inspection object, a nondestructive inspection of the inspection object is performed using an ultrasonic probe via the contact medium, a polymer gel in which high polymers are cross-linked is used as the contact medium, and after the contact medium has been attached to the inspection object, and before the nondestructive inspection is performed, the contact medium is pressed against the inspection object.
- Furthermore, a contact medium pressing jig according to an aspect of the present disclosure is a contact medium pressing jig that presses a contact medium against an inspection object, and is provided with a pressing surface that is parallel to a surface of the inspection object.
- In the present disclosure, a polymer gel is used as the contact medium, and the contact medium is pressed against the inspection object before the nondestructive inspection using the ultrasonic probe is performed. As a result, the contact medium that is formed by the polymer gel can be deformed so as to match the complex shape of the inspection object, and can be spread to all corners of a space, so that the contact medium is able to properly fill the space entirely. Because the polymer gel is deformed flexibly in accordance with the shape of the inspection object, work efficiency when filling the space with the contact medium is improved. Moreover, the thickness of the contact medium is uniformized as a result of the contact medium being pressed so that the quality of a defect inspection performed using an ultrasonic probe can be improved.
- Moreover, because the polymer gel has a predetermined viscosity and is able to attach to an object, compared with other contact mediums such as water and oils, drops of polymer gel do not fall down and polymer gel does not contaminate surrounding areas. Moreover, because the polymer gel is a semisolid, it can be easily removed, and can also be reused.
- Accordingly, in the present disclosure, even if the inspection object has a complex shape, it is possible to perform an on-site nondestructive inspection easily.
-
-
FIG. 1 is a diagram representing a nondestructive inspection method according to an embodiment of the present disclosure. -
FIG. 2A is a diagram representing a step in which a contact medium is attached to an inspection object in the nondestructive inspection method according to the embodiment of the present disclosure. -
FIG. 2B is a diagram representing a step in which the contact medium is attached to the inspection object in the nondestructive inspection method according to the embodiment of the present disclosure. -
FIG. 2C is a diagram representing a step in which the contact medium is attached to the inspection object in the nondestructive inspection method according to the embodiment of the present disclosure. -
FIG. 3A is a diagram representing a step in which the contact medium is separated from the inspection object in the nondestructive inspection method according to an embodiment of the present disclosure. -
FIG. 3B is a diagram representing a step in which the contact medium is separated from the inspection object in the nondestructive inspection method according to an embodiment of the present disclosure. -
FIG. 4 is a structural diagram representing a contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 5 is a structural diagram representing a contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 6A is a structural diagram representing a contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 6B is a structural diagram representing the contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 7A is a structural diagram representing a contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 7B is a structural diagram representing the contact medium pressing jig according to another embodiment of the present disclosure. -
FIG. 8 is a plan view representing a contact medium that is attached to an inspection object in the nondestructive inspection method according to another embodiment of the present disclosure. -
FIG. 9 is a structural diagram representing a contact medium used in the nondestructive inspection method according to another embodiment of the present disclosure. - Hereinafter, embodiments of the present disclosure are described with reference to the drawings. Note that in the following description, a fan case of a jet engine is used as an example of an inspection object of the present disclosure, however, the present disclosure may also be applied in the same way to other objects of inspection having a complex shape.
-
FIG. 1 is a diagram representing a nondestructive inspection method according to an embodiment of the present disclosure. - As is shown in
FIG. 1 , in the nondestructive inspection method of the present embodiment, acontact medium 10 is attached to aninspection object 1, and a nondestructive inspection of theinspection object 1 is made using anultrasonic probe 20 via thecontact medium 10. - The
inspection object 1 of the present embodiment is a fan case of a jet engine, and is formed by laminating a plurality of layers of acomposite material 2. Thecomposite material 2 is formed from fiber reinforced plastic (FRP). More specifically, thecomposite material 2 is formed from carbon fiber reinforced plastic (CFRP) which is manufactured by impregnating a resin material with carbon fibers. Thecomposite material 2 is lightweight compared to a metal material, and has a strength that is not inferior to that of metal. However, because the layers of thecomposite material 2 are bonded together using resin, if an impact is applied thereto, in some cases interlayer separation S may occur between the layers of thecomposite material 2. - A honeycomb
structural body 3 is provided on asurface 1a of theinspection object 1. The honeycombstructural body 3 is provided on an inner side of the fan case. The honeycombstructural body 3 stands upright to a predetermined height from thesurface 1a of theinspection object 1. In addition to securing the mechanical strength of thecomposite material 2, the honeycombstructural body 3 also serves as a buffer in the event of a collision with an object. For example, if a bird strike occurs, a portion of the honeycombstructural body 3 that has been deformed as a result of this bird strike is removed, and a nondestructive inspection as to whether or not any interlayer separation S has occurred between the layers ofcomposite material 2 is performed. Note thatFIG. 1 shows a state in which a portion of the honeycombstructural body 3 has been removed, in other words, a state in which the honeycombstructural body 3 is lower than its original height (i.e., in a range from approximately several mm to several cm from thesurface 1a). - One reason for leaving a portion of the honeycomb
structural body 3 is that, if the honeycombstructural body 3 is removed completely, there is a deterioration in the mechanical strength of thecomposite material 2. A further reason is that, by leaving a small portion of the honeycombstructural body 3, when the honeycombstructural body 3 is cut out, any damage to thecomposite material 2 is prevented. Yet another reason is that, if it is confirmed through the nondestructive inspection that there is no separation S between the layers of thecomposite material 2, then the portion of the honeycombstructural body 3 that has been cut out is subsequently refilled using a potting material (i.e., a resin material), and it is easy in this case for the potting material to be firmly attached to the honeycombstructural body 3 due to the complex shape of the honeycombstructural body 3. - The
contact medium 10 fills a space between theinspection object 1 and theultrasonic probe 20. Thecontact medium 10 is attached to thesurface 1a of theinspection object 1 to a height (i.e., a thickness) that is greater than the height of the honeycombstructural body 3 by a predetermined distance D. If the ultrasonic probe 20 (a solid object) is placed in contact with the honeycomb structural body 3 (a solid object), in other words, if a solid object and a solid object are in mutual contact, the attenuation rate of the ultrasonic probe shows a marked increase. Accordingly, by making the height of thecontact medium 10 greater than the height of the honeycombstructural body 3, theultrasonic probe 20 can be prevented from coming into contact with the honeycombstructural body 3. The shape of thecontact medium 10 located at a higher position than the honeycombstructural body 3 is maintained by aframe body 30 that surrounds the periphery of thecontact medium 10. Theframe body 30 is formed in a toroidal shape, and surrounds an inspection range X of theinspection object 1. When seen in plan view, the inspection range X may be circular or rectangular or, alternatively, may have another shape (for example, elliptical or polygonal or the like). Note that if acontact medium 10 having high viscosity is used, then theframe body 30 may be omitted. - The
contact medium 10 is a polymer gel in which high polymers are cross-linked. By cross-linking to a highly polymerized compound (such as PVA (polyvinyl alcohol) or the like) using borax or the like, the viscosity of the polymer gel is adjusted. The polymer gel is a semisolid and has a suitable viscosity that is not sticky to the touch, while having a cold, moist feel. - A natural polysaccharide such as, for example, gum tragacanth, locust bean gum, sodium alginate, carrageenan, and guar gum and the like may be used as the high polymer compound. Natural polysaccharides have superior acid resistance, salt tolerance, and resistance to chemicals. They are also non-toxic, are low in cost, and are easily obtainable.
- The
ultrasonic probe 20 performs a nondestructive inspection of theinspection object 1 via thecontact medium 10. Specifically, theultrasonic probe 20 causes ultrasonic waves to be transmitted via thecontact medium 10 to theinspection object 1, and then, based on echo signals reflected from theinspection object 1, detects whether or not any defect such as interlayer separation S is present. Thecontact medium 10 has an effect of mitigating any discontinuity in the acoustic impedance, and ensuring that acoustic waves are efficiently transmitted to theinspection object 1. It has become evident through experiments that this effect is also imparted to thecontact medium 10 which is made from polymer gel. - In the nondestructive inspection, a plurality of
ultrasonic probes 20 having mutually different frequencies may be used in combination. For example, an interlayer separation S in a shallow location from thesurface 1a of theinspection object 1 may be inspected using a high-wavelength (for example, in a range from 5 to 15 MHz)ultrasonic probe 20, and an interlayer separation S in a deep location from thesurface 1a of theinspection object 1 may be inspected using a low-wavelength (for example, in a range from 1 to 5 MHz)ultrasonic probe 20. Namely, if the interlayer separation S occurs in a shallow location, the difference between the path of the ultrasonic waves reflected by the interlayer separation S and the path of the ultrasonic waves reflected by thesurface 1a is minimal. In this case, it is preferable to raise the resolution by raising the frequency and shortening the wavelength. On the other hand, if the interlayer separation S occurs in a deep location, the path of the ultrasonic waves reflected by the interlayer separation S is longer than the path of the ultrasonic waves reflected by thesurface 1a, so that attenuation of the ultrasonic waves may occur. In this case, it is preferable to raise the penetrative force of the ultrasonic waves by lowering the frequency and lengthening the wavelength. By distinguishing between a plurality ofultrasonic probes 20 having mutually different frequencies, a nondestructive inspection can be made irrespective of the location (in the depth direction) of the interlayer separation S as seen from the honeycombstructural body 3 side. -
FIG. 2A through FIG. 2C are views representing steps in which thecontact medium 10 is attached to theinspection object 1 in the nondestructive inspection method according to the embodiment of the present disclosure. - Firstly, as is shown in
FIG. 2A , theframe body 30 is positioned surrounding the inspection range X of theinspection object 1. Next, as is shown inFIG. 2B , an appropriate quantity of thecontact medium 10 is placed on the inner side of theframe body 30. Subsequently, as is shown inFIG. 2C , a contactmedium pressing jig 40 is inserted on the inner side of theframe body 30, and is made to press thecontact medium 10 placed inside theframe body 30 against theinspection object 1. - The contact
medium pressing jig 40 is provided with a rod-shapedhandle portion 41, and apressing portion 42 that is provided at a distal end of thehandle portion 41. The size of thepressing portion 42 is such that thepressing portion 42 can be inserted inside theframe body 30. The size of thepressing portion 42 of the present embodiment is substantially the same as that of a space on the inner side of theframe body 30. Thepressing portion 42 is guided by an inner wall surface of theframe body 30 such that any tilting of thepressing portion 42 is prevented, and, in this state, presses thecontact medium 10 against theinspection object 1. Thepressing portion 42 is provided with apressing surface 42a that is parallel with thesurface 1a of theinspection object 1. In other words, if thesurface 1a of theinspection object 1 is a flat surface, then thepressing surface 42a is also a flat surface. Note that theinspection object 1 of the present embodiment is a cylinder-shaped fan case, however, because the fan case has a large diameter, thesurface 1a within the inspection range X can be regarded as a substantially flat surface. However, if thesurface 1a is slightly curved, then it is preferable that thepressing surface 42a also be slightly curved so as to match the shape of thesurface 1a. - As a result of the pressing performed by the contact
medium pressing jig 40, thecontact medium 10 is spread to all corners of the honeycombstructural body 3, and, additionally, the height of thecontact medium 10 becomes uniform. Once thecontact medium 10 has been pressed by the contactmedium pressing jig 40 against theinspection object 1, the contactmedium pressing jig 40 is lifted up and, as is shown inFIG. 1 , theultrasonic probe 20 is placed in contact with thecontact medium 10, and then the inspection of theinspection object 1 is performed. Note that a fluororesin coating or the like may be applied to thepressing surface 42a in order to enable the contactmedium pressing jig 40 to be separated easily from thecontact medium 10 when the contactmedium pressing jig 40 is lifted up. -
FIG. 3A and FIG. 3B are views representing steps in which thecontact medium 10 is separated from theinspection object 1 in the nondestructive inspection method according to the embodiment of the present disclosure. - As is shown in
FIG. 3A , once the nondestructive inspection has ended, a contactmedium separating jig 50 is inserted along the inner wall surface of theframe body 30 with which thecontact medium 10 is in contact. The contactmedium separating jig 50 may be formed, for example, in a narrow rod shape having a bent distal end. Next, as is shown inFIG. 3B , by lifting up the contactmedium separating jig 50 that has been inserted along the inner circumferential wall of theframe body 30, thecontact medium 10 can be easily separated from the honeycombstructural body 3. - In this way, in the present embodiment, a polymer gel is used for the
contact medium 10, and thecontact medium 10 is pressed against theinspection object 1 prior to the nondestructive inspection using theultrasonic probe 20 being performed. As a consequence, thecontact medium 10 that is formed from a polymer gel can be deformed so as to match the complex shape of theinspection object 1, and can be spread to all corners of a space so that the ability of thecontact medium 10 to fill a space is ensured. Because a polymer gel can be flexibly deformed in accordance with the shape of theinspection object 1, work efficiency when filling a space with thecontact medium 10 is improved. Additionally, the thickness of thecontact medium 10 is uniformized as a result of thecontact medium 10 being pressed, and therefore the quality of a defect inspection performed using theultrasonic probe 20 can be improved. Moreover, because a polymer gel has a predetermined viscosity and is able to attach to an object, compared with other contact mediums such as water and oils, drops of polymer gel do not fall down and therefore polymer gel do not contaminate surrounding areas. Moreover, because the polymer gel is a semisolid, it can be easily removed, and can also be reused. - In the nondestructive inspection method of the present embodiment, the
contact medium 10 is attached to theinspection object 1, and a nondestructive inspection of theinspection object 1 is made using theultrasonic probe 20 via thecontact medium 10. In the nondestructive inspection method of the present embodiment, a polymer gel in which high polymers are cross-linked is used as thecontact medium 10, and after thecontact medium 10 has been attached to theinspection object 1, and before the nondestructive inspection is performed, thecontact medium 10 is pressed against theinspection object 1. By employing the above-described method, theinspection object 1 can be inspected easily on site (i.e., on-wing) even when theinspection object 1 has a complex shape, - Note that the contact medium pressing jig may also have one of the structures described below.
-
FIG. 4 is a structural diagram of a contactmedium pressing jig 40A according to another embodiment of the present disclosure. - The contact
medium pressing jig 40A shown inFIG. 4 is provided withspacers 43 that maintain the distance between thepressing surface 42a and thesurface 1a of theinspection object 1 at a fixed distance. Thespacers 43 are supported on thepressing portion 42. Thespacers 43 are formed in a rod shape, and are provided protruding from thepressing surface 42a. Thespacers 43 are formed longer than the honeycombstructural body 3. In consideration of providing stability when the contactmedium pressing jig 40A performs a pressing action, it is preferable that three ormore spacers 43 be provided. According to the contactmedium pressing jig 40A, because the contact by thepressing portion 42 with the honeycombstructural body 3 is restricted as a result of the distal end of thespacers 43 being in contact with thesurface 1a, the thickness D of thecontact medium 10 can be reliably secured. As a consequence, work efficiency when pressing thecontact medium 10 against theinspection object 1 is improved. -
FIG. 5 is a structural diagram of a contactmedium pressing jig 40B according to another embodiment of the present disclosure. - The contact
medium pressing jig 40B shown inFIG. 5 is provided with aframe portion 44 that surrounds the inspection range X of theinspection object 1. Theultrasonic probe 20 is disposed, via asecond contact medium 60, on arear surface 42b which is on an opposite side to thepressing surface 42a. Theframe portion 44 is formed integrally with thepressing portion 42. Theframe portion 44 is formed in a toroidal shape, and protrudes from an outer edge portion of thepressing surface 42a. By being in contact with the honeycombstructural body 3, theframe portion 44 also performs the function of thespacer 43. Theultrasonic probe 20 is disposed in an interior portion of the hollow contactmedium pressing jig 40B. Thesecond contact medium 60 is coated onto therear surface 42b which is on the opposite side to thepressing surface 42a. Thesecond contact medium 60 may also be formed from the above-described polymer gel, or, alternatively, a normal, widely-used contact medium such as glycerin or the like. According to the contactmedium pressing jig 40B, there is no need to provide theseparate frame body 30, as is shown inFIG. 2A through FIG. 2C , when pressing thecontact medium 10. As a consequence, work efficiency when pressing thecontact medium 10 against theinspection object 1 is improved. Furthermore, according to this structure, a nondestructive inspection using theultrasonic probe 20 which is disposed in the interior portion of the contactmedium pressing jig 40B can be performed without lifting up the contactmedium pressing jig 40B, so that the work efficiency of the nondestructive inspection is improved. -
FIG. 6A and FIG. 6B are structural diagrams of a contactmedium pressing jig 40C according to another embodiment of the present disclosure. - The contact
medium pressing jig 40C shown inFIG. 6A and FIG. 6B is provided with a communicatingportion 44a that enables aninner surface 44A of theframe portion 44 to communicate with anouter surface 44B thereof. As is shown inFIG, 6B , theframe portion 44 is formed in a toroidal shape on an outer side of thepressing surface 42a, and the communicatingportion 44a is a groove that is formed in a straight line extending from theinner surface 44A to theouter surface 44B of theframe portion 44. Note that, instead of being formed as a groove, the communicatingportion 44a may also be formed as a hole. As is shown inFIG. 6A , a part of thecontact medium 10 that is being pressed by the contactmedium pressing jig 40C is squeezed towards theouter surface 44B side through the communicatingportion 44a. As a result, during a pressing operation, anyexcess contact medium 10 is prevented from leaking out from an unexpected location, so that the work efficiency when pressing thecontact medium 10 against theinspection object 1 is improved. Note that a plurality of communicatingportions 44a may be formed, however, because this allows air and the like to easily enter into the inspection range X, it is preferable that the number of communicatingportions 44a be kept as low as possible. -
FIG. 7A and FIG. 7B are structural diagrams of a contactmedium pressing jig 40D according to another embodiment of the present disclosure. - The contact
medium pressing jig 40D shown inFIG. 7A and FIG. 7B is provided with aclaw portion 45 that grasps thecontact medium 10. - As is shown in
FIG. 7A , theclaw portion 45 is formed so as to protrude inwards from a distal end of theframe portion 44. Theclaw portion 45 may be formed a toroidal shape, or, alternatively, a plurality ofclaw portions 45 may be formed as projections at intervals in a circumferential direction. As a consequence, as is shown inFIG. 7B , thecontact medium 10 can be separated from theinspection object 1 integrally with the contactmedium pressing jig 40D. Because of this, the work efficiency when separating thecontact medium 10 from theinspection object 1 is improved. - Embodiments of the present disclosure have been described above while referring to the drawings, however, it should be understood that the present disclosure is not limited to the above-described embodiments. The various shapes and combinations and the like of the respective component elements illustrated in the above-described embodiments are merely examples thereof, and various modifications may be made thereto based on design requirements and the like insofar as they do not depart from the spirit or scope of the present disclosure.
-
FIG. 8 is a plan view representing acontact medium 10 that is attached to aninspection object 1 in the nondestructive inspection method according to another embodiment of the present disclosure. - As is shown in
FIG. 8 , thecontact medium 10 may contain aphosphorescent material 11. Zinc sulfide (ZnS-based), strontium aluminate (SrA1204-based) or the like may be used as thephosphorescent material 11. Because it is difficult for light to reach the interior of the fan case, work performed there takes place in a dark field. As thephosphorescent material 11 is contained in thecontact medium 10, an operator is able to more easily view thecontact medium 10. As a consequence, it becomes easy to confirm that the task of filling a space with thecontact medium 10 has been performed properly, or to confirm whether anycontact medium 10 is remaining during a separation operation. -
FIG. 9 is a structural view of acontact medium 10A that is used in a nondestructive inspection method according to another embodiment of the present disclosure. - As is shown in
FIG. 9 , thecontact medium 10A is formed in a shape that conforms to the shape of the honeycombstructural body 3. In other words, thecontact medium 10A is provided with a plurality of protrudingportions 10a that are inserted into the spaces in the honeycombstructural body 3. The protrudingportions 10a are formed longer than the depth of the spaces in the honeycombstructural body 3, so that when thecontact medium 10A is engaged with theinspection object 1 and is pressed against theinspection object 1, the protrudingportions 10a are contracted in the long axial direction thereof and are placed in firm contact with thesurface 1a. In addition, as the protrudingportions 10a become fatter, the protrudingportions 10a fill the spaces in the honeycombstructural body 3. In this manner, when the shape of theinspection object 1 is predetermined, by usingcontact medium 10A that has been molded to the shape of theinspection object 1, the engagement and the separation of thecontact medium 10 can proceed efficiently. Moreover, if the moldedcontact medium 10A is used, then using theframe body 30 becomes unnecessary. - Furthermore, the methods and structures each of the above-described embodiments may be used in a variety of suitable combinations.
- According to the present disclosure, even if an inspection object has a complex shape, it is possible to perform an on-site nondestructive inspection easily.
-
- 1
- Inspection object
- 1a
- Surface
- 2
- Composite material
- 3
- Honeycomb structural body
- 10
- Contact medium
- 10A
- Contact medium
- 11
- Phosphorescent material
- 20
- Ultrasonic probe
- 30
- Frame body
- 40
- Contact medium pressing jig
- 40A
- Contact medium pressing jig
- 40B
- Contact medium pressing jig
- 40C
- Contact medium pressing jig
- 40D
- Contact medium pressing jig
- 42a
- Pressing surface
- 42b
- Rear surface
- 43
- Spacer
- 44
- Frame portion
- 44a
- Communicating portion
- 44A
- Inner surface
- 44B
- Outer surface
- 60
- Second contact medium
- X
- Inspection range
Claims (9)
- A nondestructive inspection method in which a contact medium is attached to an inspection object, and a nondestructive inspection of the inspection object is performed using an ultrasonic probe via the contact medium, wherein
a polymer gel in which high polymers are cross-linked is used as the contact medium, and
after the contact medium has been attached to the inspection object, and before the nondestructive inspection is performed, the contact medium is pressed against the inspection object. - The nondestructive inspection method according to claim 1, wherein:a frame body is installed and surrounds an inspection range of the inspection object; anda contact medium pressing jig is inserted on an inner side of the frame body, and presses the contact medium that has been disposed on the inner side of the frame body against the inspection object.
- The nondestructive inspection method according to claim 1 or 2, wherein a honeycomb structural body is provided on a surface of the inspection object.
- The nondestructive inspection method according to any one of claims 1 through 3, wherein the contact medium contains a phosphorescent material.
- A contact medium pressing jig that is configured to press a contact medium against an inspection object, wherein
the contact medium pressing jig is provided with a pressing surface that is parallel to a surface of the inspection object. - The contact medium pressing jig according to claim 5, further comprising spacers that maintain the distance between the pressing surface and the surface of the inspection object at a fixed distance.
- The contact medium pressing jig according to claim 5 or 6, further comprising a frame portion that surrounds an inspection range of the inspection object.
- The contact medium pressing jig according to claim 7, wherein:the pressing surface is formed on an inner side of the frame portion; andthe contact medium pressing jig further comprises a communicating portion that enables an inner surface and an outer surface of the frame portion to mutually communicate.
- The contact medium pressing jig according to any one of claims 5 through 8, further comprising an ultrasonic probe that is disposed, via a second contact medium, on a rear surface that is on an opposite side to the pressing surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016073187 | 2016-03-31 | ||
PCT/JP2016/079458 WO2017168795A1 (en) | 2016-03-31 | 2016-10-04 | Nondestructive inspection method and coupling medium pressing jig |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3376219A1 true EP3376219A1 (en) | 2018-09-19 |
EP3376219A4 EP3376219A4 (en) | 2019-07-31 |
Family
ID=59963811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16897012.7A Withdrawn EP3376219A4 (en) | 2016-03-31 | 2016-10-04 | Nondestructive inspection method and coupling medium pressing jig |
Country Status (4)
Country | Link |
---|---|
US (1) | US20180292360A1 (en) |
EP (1) | EP3376219A4 (en) |
JP (1) | JPWO2017168795A1 (en) |
WO (1) | WO2017168795A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109828030B (en) * | 2019-03-28 | 2021-07-27 | 烟台中凯检测科技有限公司 | Reflector morphology extraction system and method based on sound field characteristics |
KR102672202B1 (en) * | 2022-12-05 | 2024-06-05 | 한전케이피에스 주식회사 | Nondestructive testing apparatus |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3826127A (en) * | 1972-10-04 | 1974-07-30 | Rockwell International Corp | Composition for ultrasonic inspection of objects and method for employing same |
JPH01112104A (en) * | 1987-07-21 | 1989-04-28 | Kawasaki Steel Corp | Method for measuring ultrasonic wave propagation time and ultrasonic probe |
CH690851A5 (en) * | 1996-11-25 | 2001-02-15 | Speno Internat S A | Apparatus for measuring internal defects of a rail by ultrasound. |
JP4244172B2 (en) * | 2003-08-13 | 2009-03-25 | 株式会社Ihi | Ultrasonic probe for high temperature |
JP4446761B2 (en) * | 2004-02-25 | 2010-04-07 | 富士重工業株式会社 | Ultrasonic sensor head of ultrasonic nondestructive inspection equipment |
JP3864180B2 (en) * | 2004-11-15 | 2006-12-27 | 独立行政法人 宇宙航空研究開発機構 | Ultrasonic test method and ultrasonic test apparatus used therefor |
US8336384B2 (en) * | 2006-02-02 | 2012-12-25 | The Boeing Company | Ultrasonic probe |
JP2011017542A (en) * | 2009-07-07 | 2011-01-27 | Hitachi-Ge Nuclear Energy Ltd | Ultrasonic inspection device |
WO2014036170A1 (en) * | 2012-08-29 | 2014-03-06 | Thync, Inc. | Systems and devices for coupling ultrasound energy to a body |
JP6300225B2 (en) * | 2013-12-03 | 2018-03-28 | 東芝エネルギーシステムズ株式会社 | Turbine blade inspection device and inspection method thereof |
-
2016
- 2016-10-04 JP JP2018508357A patent/JPWO2017168795A1/en active Pending
- 2016-10-04 EP EP16897012.7A patent/EP3376219A4/en not_active Withdrawn
- 2016-10-04 WO PCT/JP2016/079458 patent/WO2017168795A1/en unknown
-
2018
- 2018-06-11 US US16/005,030 patent/US20180292360A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JPWO2017168795A1 (en) | 2018-08-02 |
WO2017168795A1 (en) | 2017-10-05 |
US20180292360A1 (en) | 2018-10-11 |
EP3376219A4 (en) | 2019-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20180292360A1 (en) | Nondestructive inspection method and contact medium pressing jig | |
JP6450158B2 (en) | Method for identifying processing position in repair material and repair method | |
US20140354113A1 (en) | High frequency piezocomposite and methods for manufacturing same | |
EP3532833B1 (en) | Acoustic emission sensors with integral acoustic generators | |
KR102039526B1 (en) | Device and method for inspection of sealing performance of pouch type secondary battery | |
EP3683462A3 (en) | Composite shaft with outer periphery ring | |
JP5947555B2 (en) | Sealed battery and method for manufacturing the same | |
DE10353081B3 (en) | Method for detecting changes or damage to pressure vessels during or after their pressure test | |
CN105510447A (en) | Mounting device for acoustic emission sensor for hydrofracture simulation experiment | |
EP3073470A1 (en) | Blood vessel phantom | |
EP2811289A1 (en) | Thermographic inspection system for composite wind turbine blade | |
US20140158245A1 (en) | Method of making a flexible delay line, a flexible delay line and a transducer | |
CN206595069U (en) | A kind of cable being easily installed | |
EP1632774A3 (en) | Apparatus for non-destructive testing of objects with ultrasounds | |
DE112011101809T5 (en) | Acoustic ultrasonic emissions to detect a substrate fracture | |
EP3073469A1 (en) | Simulated organ and method for preparing simulated organ | |
EP2238443B1 (en) | Device and method for the non-destructive testing of a test object by way of ultrasound TOFD technology | |
CN209432751U (en) | Fixation device for plastic packaging microcircuit device batch scanning | |
EP2771133A2 (en) | Electroacoustic converter | |
KR101457075B1 (en) | A inspection equipment for waterproof performance | |
DE102017106045A1 (en) | Procedure for calibrating a level gauge and level gauge | |
CN109490422A (en) | Fixation device for plastic packaging microcircuit device batch scanning | |
JP2010508003A (en) | Improvements to sonar baffles and backing | |
CN214251414U (en) | Pressure vessel leakproofness detection device | |
EP2749764A1 (en) | Turbine blade, manufacturing of the turbine blade and use of the turbine blade |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20180615 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: YAMAGUCHI, YUICHI Inventor name: HASHIMOTO, SHUHEI |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20190701 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: G01N 29/04 20060101ALI20190625BHEP Ipc: G01N 29/28 20060101AFI20190625BHEP |
|
17Q | First examination report despatched |
Effective date: 20200429 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20200625 |